If you are using bash, you have to use double quotes " " instead of ' '.
corsima
On Monday, December 18, 2017 at 4:48:48 PM UTC+1, dwal...@gmail.com wrote:
>
> I have variables taken from a text file as such:
>
> ml1=1
> ml2=2
> ml3=3
>
> ad1=1
> ad2=2
> ad3=3
>
> I want to use these variables in otbcli_BandMath like so:
>
> otbcli_BandMath -il ${MY_INPUT}_B2.TIF -out B2TOA.TIF -exp
> '(ml2*im1b1)+ad2'
>
> But it keeps showing that ml2 and ad2 are not recognised. This is because
> they are defined in the bash shell script and i've read that once in the
> expression quotes otb uses muparserX and so the variables must be defined
> in muparserX in order to be used. My problem is that i do not know how to
> use muparserX as i'm very new to programming. Does anyone know how i can
> use my predefined variables in the expression quotes?
>
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